chore(release): v1.12.11 — unify settings notice colours and callout style

Route every Settings callout, badge and status note through the semantic
colour tokens (success / warning / info / primary) instead of raw palette
classes, so the same meaning reads identically across cards and stays
legible in light mode. Add a single SettingsInfoTile primitive — icon +
tone + text on one fixed surface — and adopt it for the threshold-override
caution note, replacing a bespoke box.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/api/openapi.yaml

@@ -1,7 +1,7 @@
 openapi: 3.1.0
 info:
   title: HealthLog API
-  version: 1.12.10
+  version: 1.12.11
   description: >-
     Self-hosted personal-health-tracking PWA — public API surface for the iOS native client and external ingest.